Rational numbers

12345678
Across
  1. 3. right side of the sign equal
  2. 5. law of multiplication over addition
  3. 7. repeated addition
  4. 8. Has no identity element
Down
  1. 1. Resiprocal
  2. 2. [a/b] have this type of symbol
  3. 4. identity element of addition
  4. 6. Has no reciprocal